docker pull xxx:xxx 报错
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Error response from daemon: pull access denied for xxx:xxx, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
这是因为仓库不是公开访问，需要授权，联系仓库管理员给你授权后，执行
docker login -u=授权用户名 -p=授权密码[如果有填写，没有就移除] xxx:xxx[仓库地址]
